Grain-drill.



J. P. STEWARD,

GRAIN DRILL. APPLICATION FILED JULY 12, 1909.

Patented Apr. 5,19%.

lit

UNlTED $TATES PATENT JOHN F. STE\VARD, OF CHICAGO. ILLINOIS, ASSIGNOR TO INTERNATIONAL HARVESTER COMPANY. A CORPORATION OF NEW JERSEY.

GRAIN-DRILL.

Specification of Letters Patent.

llatentetll Apr. 11911.0.

Application filed July 12. 1909. Serial No. 507.032. i

To all lI/l()llt it may] concern:

Be it known that I, Jon) 1*. S'lliWARl), a eitizen ol the United States, residing at thieago, in the county of Cook and State of lllinois, have invented certain new and useful Improvements in Grain-Drills, of which the following is anfull specification, relerence being had to the accompanying drawing.

This invention relates particularly to scrapers tor disks ol seed drills, and its ohj et is to so shape and associate the boot. and scraper relative to the disk as to result in .1 thorough scraping etleet and leave tree spat-e between it and the lower end of the boot. lret'erahtv. l permit the lower end ol the boot to be spaced a little distance apart from the disk.

Figure l is a side elevation ol' my invention a l have seen lit to embody it, showing the prel'erred position ot the scraper and preferred form for the lower termination ot' the boot; l ig. 2 is a rear el vation ol the same parts; l ig. 3 shows the parts of l-ig. l as viewed from beneath; Fig. -l i a seetion ot' the. parts of Fig. l as shown on the line l'" l of Fig. 1; Fig. 5 is a perspective view of the scraper alone.

is the disk of an ordinary seed drill shown, in this instance, as oi? the concaveconvex form,

15 is the boot and C the drag bar. As embodied. the. drag bar is secured to the disk hearing bracket l and, by means oi the holts that secure it to the drag bar, the l'orwardly extending arm ot the boot is also .s'tetii'ed.

.\ll parts ot the device. shown follow a eommon 'l'orm ot construction except the st'lapet' i and, preferably, the lower end of the boot I). it is preteralile that the lower end ol the boot shall not. form a point directed l'orwardly, but, on the contrary, be rounded downward and backward so that shreds ot roots and grass shall be passed over by it rather than permitted to accumulate. I deem it better to place the lower end ot the boot a little distance from the disk in ordcr'that there may be space for the passage ot' roots and shreds of grass that might otherwise accumulate. and extend the scraper from near the center of the disk downward and backward, throwing its lower edge practically in contact. with the disk, but its upper edge some distance away from the disk. The general plane of the scraper is out aid and down and from the disk, and its lower end i deflected away from the boot. Thus providing a space between the scraper blade and the toe of the boot, no pocket is left in which shreds of grass or roots may :nreumulate. 1 do not extend the scraper to the lower end or toe ot the boot, as to do so would in part defeatthe object of my invention. but extend it. some distance backward ot the toe of the boot and its extreme end portion somewhat lower than the toe of the boot.

Another object in providing space hetween the toe of the boot and the lower end of the scraper is to permit free elastic movemeut ot' the scraper. which could not result it the lower end of the scraper extended to and eontaeted with the boot.

Because ot' the ditlieulty in imiuutaeturing the disks. they seldom rotate truly. hut. on the contrary. wal hle to some extent. This wahhliug aetion occurs at center or eiieuuitereuee. or both. and heme l tind it de irable to so make th craper that its end near-- est the axis ot rotation of the di k. as well as that portion near the eireum l'ereuee ol' the disk. may have elastic eoutat't during the entire rotation. In order to accompli h this result I gash it as shown in Fig. l. leaving the lower portion as one piece with the upper portion l".. the two being lt-l't united at the rear end. l tind it less expensive t0 make the scraper in this manner than to make it in two parts. securing E and (2 together by rivets or otherwise.

I is the axial bolt of the disk support. it is prefer: ble to secure the upper end ol the scraper between the part D and the disk. although it may be secured to D or any substitute therefor in any suitable manner.

Constructing my scraper as I do, the lower end is permitted freedom of move.- ment laterally to eonforntto wabbling disks by the elastic yielding of the metal along the length of the portion E that is above the cle'tt, and lower portion a that is below the cleft permitted to yield atits point nearest the center of the disk because of the clas tiei y within itself.

't he scraper is made of metal sutlieiently thick to maintain its position without any control other than at its point of attachment, whether actually coincident with the center of the disk or otherwise. 'lhus conscraper, the latter so structed of metal sufliciently strong to maintain its own position, and being thrown a little distance from the toe of the boot, the latter can in no way affect its action.

I wish to draw a distinction between my scraper and those which are secured to the toe of the boot or contact with the toe of the boot in order that their position may be maintained, or fit in notches in the toe of the boot, or lie between the toe ofthe boot and the disk; in short, -my scraper may be distinguished from those mentioned b its absolute freedom from control of the boot What I claim as my invention, and desire to secure by Letters Patent, is:

1. In combination, a disk, a boot and a scraper, the latter extending from near the center of the disk to a point near its circumference, its lower end outside of the lower end of the boot and deflected outwardly therefrom and thus uncontrolled thereby.

2. In combination, a disk, a boot and a laced as to scrape from near the center of the disk to a point nearits circumference, and consisting of plate metal of such thickness as to give suitable elasticity to all parts of its scraping edge and cleft from its end of attachment to its sup ant to a point near its rear and lower end, w ereby not only the lower and rear end of the scraper may be permitted to yield elastically, but by such partial cleft the part of the scraping edge nearest the center of the disk maybe free by its elastic (rinovement to conform to the surface of the isk..

3. In combination, a boot, the lower end of which is rounded downwardly and rearwardly, a scraper 'so placed as to scrape the disk from near its circumference to a point nearer its center and consisting of plate metal of such thickness as to give suitable elasticity to all parts of its"scraping edge and cleft from its end of attachment to its support to a point near its rear and lower end of the scraper may be permitted to yield elastically, but by such partial cleft the part of the scraping edge nearest the center 10,1,

the disk may be free by its elasticmove ment to conform to the surface of the disk. 4. In combination, a disk, a boot and a scraper, the said scraper suitably secured and extending from near the center of the disk downwardly and rearwardly from its place of sccurement, its upper edge outside of the lower end of the boot and so separated therefrom as to leave a clearance space between itself and the boot and its lower edgeso deflected as to contact with the disk.

5. In a seed drill, in combination with a boot, a. disk support and a disk, a scraper consisting of a plate having a cleft beginning at its supported end and extending to a point near the unsupported end, the support adapted to sustain the active edge of the scraper in its operative'position relative to the disk.

JOHN F. STEWARD.

Witnesses:

F. W. HorrMEis'rnR,

E. LOCKERT.

end, whereby not only the lower and rear 7 

